Porous coordination polymer chemical

Approaches to the formation of three new types of micro-porous materials that complement zeolites will be discussed. In each case, whether metal coordination polymers, metal-linked ceramic oxide clusters, or new hybrids containing both coordination and ceramic components, engineering of the Secondary Building Unit (SBU) is of critical importance. Successful examples of these approaches include the first thermally stable 3-D micro-porous coordination polymer with chemical functionalizability [Cu3(TMA)2(H20)3] , as well as a 3-D micro-porous cluster based material [V,2B18O60H8(Cd(en)(H2O) 3]". ... 

Figure 4. Structure of [Cu3(TMA)2(H20)3]n -A Chemically Functionalizable Micro-porous Coordination Polymer...

Hermes S, Schroter MK, Schmid R, Khodeir L, Muhler M, Tissler A, et al. Metal MOF loading of highly porous coordination polymers host lattices by metal organic chemical vapor deposition. Angew Chem, Int Ed 2005 44 6237-41. 

Keywords Charge transfer Chemical sensor Energy transfer Metal-organic frameworks Porous coordination polymers Structural transformation... 

Some lanthaitide ions have also well-known catalytic properties. For instance, the Sm(II) ion is extensively used in asymmetric catalysis (lananaga et al., 2002) and cerium and praseodymium, thanks to their 111/IV valences, are used in many depollution processes ( Catalysis by Ceria and Related Materials , 2002). This second class of application seems to be very promising as far as coordination polymers are concerned. The prerequisites for these applications are clearly a high thermal stability, a porous network and a chemical availability of the lanthaitide ions. 

Borovik and co-workers (29-31) developed porous organic materials for reversible binding of CO, O2, and NO by means of gas chemical coordination to the metal centers. For immobihzation of metal centers, templated copolymerization was employed (Fig. 7). Material 14, for example, contained immobilized four-coordinate Co(II) centers, and the cobalt concentration ranged from 180 to 230 mol g with an average pore diameter of 25 A (31). Polymer 14 bound NO in toluene solution and even on the air-solid interphase, but was relatively inert toward other biologically important gases O2, CO2, and CO. Nitric oxide could be slowly released from 14 under ambient conditions. For example, after 30 days 80% of NO was lost. Heating the sample accelerated the gas release. 

Complexation studies of Zr and Hf by TBP in a porous styrene-divi-nylbenzene polymer matrix by high-resolution P and NMR at 300-560 K were made by Randarevich et al. [54]. The chemical shifts observed for the solid extractant in contact with 6 M HNOj indicate the formation of HNOj(TBP)n solvates, and the shifts observed on the addition of Zr and Hf indicate the coordination of TBP to these metal ions. For... 

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